Answer:
Total 495 liters of natural oil are needed.
Explanation:
It is given that Petrolyn motor oil is a combination of natural oil and synthetic oil. It contains 5 liters of natural oil for every 3 liters of synthetic oil.
It means the ratio of natural oil and synthetic oil is
Let in order to make 792 liters of Petrolyn oil he needs x liters of natural oil.
It means the ratio of natural oil and synthetic oil is
Equate both ratios,
On cross multiplication we get
Divide both sides by 8.
Therefore total 495 liters of natural oil are needed.
Answer - Speciation
Reasoning - Pretty much what has happen was the two species has evolved over the course of evolution if you want to put it that way why the are incapable of breeding.
C. Gradual
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Answer:
The beetle population would NOT be expected to decrease until pine population decreases in size.
Explanation:
The southern pine bark beetle is responsible for some of the most important pine forests loss in the last forty years. The insect identifies a pine of a certain advanced age and digs a hole in the bark to establish in places were sugars and starch circulate. There it lays its eggs and feeds. When larvae feed, they introduce a fungus that interrupts water and nutrients circulation between roots and leaves, causing the pine death. When the pine is completely infested or is dead, the insects move to another pine, dispersing and increasing the population size.
As the beetle population size increases, the pine population decreases, after being killed by the insects. When a pine dies, it not only stops producing food for the beetles but it also becomes susceptible to being inhabited by other species that might be predators of these beetles.
The beetles' population starts to decrease when most of the pines in the forest are dying. They hardly have available food and they are more exposed to being eaten by their predators.
The beetle population would NOT be expected to decrease until the pine population decreases in size.
It is the cycle of predator-prey, where predators population affect the dinatic of prey population, and viceversa. Populations sizes increase and decrease in these cycles. Herbivory is a kind of predation, in which the prey is a plant. In this example, the predator is the beetle and the prey in the pine.
Answer:
biology is called biologist
math is called mathematician